Even years later, the core toolkit in v13.1.5.35 handles the heavy lifting of modern video production:
If you are still using this version, ensure your are updated to the "Studio" version rather than "Game Ready" (for NVIDIA users). This ensures that the Hardware Acceleration in AME 2019 stays efficient with modern video files. The Bottom Line Adobe Media Encoder 2019 13.1.5.35
For many, the 2019 era of Adobe software was a "Golden Age" of performance. Version 13.1.5.35 was one of the final, most polished iterations of that cycle. Even years later, the core toolkit in v13